【摘要】：本文以石油地質(zhì)理論為指導(dǎo),充分利用地球物理測(cè)井、地震、重磁、錄井、露頭勘測(cè)以及實(shí)驗(yàn)測(cè)試分析等多元資料信息,在分析區(qū)域地質(zhì)背景和前人研究成果基礎(chǔ)上,通過(guò)地層、沉積、構(gòu)造等基礎(chǔ)地質(zhì)特征研究,重點(diǎn)對(duì)河套盆地呼和坳陷第四系及上新統(tǒng)生儲(chǔ)蓋等油氣成藏條件分析和成藏機(jī)理研究,尋找圈閉,進(jìn)行有利區(qū)帶預(yù)測(cè)。研究認(rèn)為河套盆地為中新生代斷陷盆地,北深南淺,箕狀不對(duì)稱結(jié)構(gòu),呼和坳陷為其第二大次級(jí)坳陷區(qū)。自白堊系開始斷陷下沉,沉積的地層主要有:下白堊統(tǒng)、始新統(tǒng)、漸新統(tǒng)、中新統(tǒng)、上新統(tǒng)及第四系。河套盆地的形成和發(fā)育主要經(jīng)歷了燕山、喜山兩期構(gòu)造運(yùn)動(dòng)影響。白堊紀(jì)晚期受剪切拉張作用開始斷陷下沉,進(jìn)入盆地演化階段。盆地不是持續(xù)下沉,具有沉降-停止-隆升-再沉降-停止-隆升的震蕩、脈動(dòng)的特點(diǎn),晚更新世以來(lái)具有“盆-山耦合”效應(yīng)。呼和坳陷第四系及上新統(tǒng)發(fā)育的沉積相類型主要有半深湖相,淺湖相,濱淺湖相,濱湖相。呼和坳陷新近系上新統(tǒng)、第四系更新統(tǒng)具備生物氣成藏地質(zhì)條件。該區(qū)有機(jī)質(zhì)豐度高,生氣能力強(qiáng),干酪根類型好;儲(chǔ)層孔、滲性能優(yōu)越;大面積穩(wěn)定分布的芒硝層、泥質(zhì)巖層是良好的區(qū)域性蓋層;地層序列及巖性組合為生物氣藏形成了有利的生、儲(chǔ)、蓋空間配置。通過(guò)對(duì)地層、構(gòu)造、沉積相等基礎(chǔ)地質(zhì)特征的研究及第四系、上新統(tǒng)油氣地質(zhì)特征的綜合分析,預(yù)測(cè)出三個(gè)有勘探利區(qū):一是位于土右旗-大城西之間,面積約300Km2,另兩個(gè)分別位于哈素-塔布賽-畢克齊和東部新營(yíng)子一帶,面積分別約350Km2和150Km2。
[Abstract]:Guided by petroleum geology theory, this paper makes full use of geophysical logging, seismic, gravity and magnetic data, logging, outcrop survey and experimental testing and analysis, based on the analysis of regional geological background and previous research results. By studying the basic geological characteristics of strata, sedimentation and structure, this paper focuses on the analysis of oil and gas reservoir-forming conditions and reservoir-forming mechanism of Quaternary and Upper Pliocene in Huhe depression, Hetao Basin, in order to search for traps and predict favorable zones. It is considered that Hetao basin is a Meso-Cenozoic fault basin, shallow in the north and south, with an asymmetric skip structure, and Huhe depression is the second largest sub-depression area of Hetao basin. The sedimentary strata are as follows: lower Cretaceous, Eocene, Oligocene, Miocene, Pliocene and Quaternary. The formation and development of Hetao basin mainly experienced the tectonic movement of Yanshan and Xishan. In the late Cretaceous, under shear tension, the fault depression began to sink and entered the stage of basin evolution. The basin is not continuously sinking, it has the characteristics of subsidence-stop-uplift-re-subsidence-stop-uplift and pulsation. Since the late Pleistocene, it has the effect of "basin-mountain coupling". The sedimentary facies of Quaternary and Pliocene in Huhe depression are mainly semi-deep lacustrine facies shallow lacustrine facies and lacustrine facies. The Upper Pleistocene and Quaternary Pleistocene in Huhe depression have geological conditions for biogas reservoir formation. In this area, the abundance of organic matter is high, the gas generation ability is strong, the kerogen type is good, the reservoir pore, the permeability is superior, the large area stable distribution of manganite layer, the muddy rock is a good regional caprock; Stratigraphic sequence and lithologic assemblage have formed favorable source, reservoir and cap space configuration for bio-gas reservoir. Based on the study of basic geological characteristics of stratigraphic, structural and sedimentary equivalence and comprehensive analysis of oil and gas geological characteristics of Quaternary and Pliocene, three exploration areas are predicted: one is between TuYouqi and west Dacheng, with an area of about 300km ~ 2, with an area of about 300 km ~ 2, with an area of 300 km ~ 2. The other two are located in the area of Hasou-Tabsai-Bickzi and Xinyingzi in the east, covering about 350Km2 and 150Km2, respectively.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

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本文編號(hào)：2461948